Domestic Servant, especially in British Victorian era, includes: house steward butler housekeeper cook valet lady's maid foot man nurse maid parlor maid house maid kitchen maid laundry maid general servant/ maid of all works governess http://commons.wikimedia.org/wiki/Domestic_servant

"Domestic Servant" -- This is the way you can describe yourself if you marry a lazy, authoritarian, good-for-nothing husband, who makes you cater to his every whim! But if you are lucky enough to get a husband who never wants you to work, who buys you the best that money can buy, and who caters to your every whim and desire, then you should definitely describe yourself as a "Domestic Goddess"! :-)))

A domestic worker is someone who works within the employer's household. Domestic workers perform a variety of household services for an individual or a family, from providing care for children and elderly dependents to cleaning and household maintenance, known as housekeeping. Responsibilities may also include cooking, doing laundry and ironing, food shopping and other household errands. Some domestic workers live within the household where they work. cowboy...

It's a maid or a butler. A servant who works in the house. It's an old fashioned expression. We don't refer to anyone as "servants" these days (apart from public servants).